Tunneling-machine.



www-- iNz/ENTOR.

TUNNEHNG MACHINE.

'APPLEGATON FILED NOV. 6, 1907.

&--1 FX ATTORNEY,

TUNNELING MAGHNE.

LPPLIOAToN 'Hmm Nov. 1907.

G SHlEETS-GEEET 2.

.......mw- T M nm... AW

IN V Ff N TOR.

R. BENNETT.

TUNNELING MACHINE.

APPLIOATION FILED NOV. 6, 1907.

Paantei May 24, 1910.

BSHBETS-SHBET 5.

INVENTOR. 6 Il?. @6p/7 @www ATTORNEY.

WITNESSES :if 1m 77.2@ U

G. R. BENNETT. TUNNELING MACHINE. APPLICATION FILED NOV. 6, 1907.

Patented May 24, 1910.

ssmmssmm 6.

` INVENTOR. Gf?. Ben/7e# WTNESSES if /Ym To L/ .friuli/'1. l." may;{fonce/11.1,:

il l-:nown limi l. (leonor: li. li u "ilirfieii olj llirl'niind --linesoll i resirlii uw, il' l. und filiale or non' mid u .i il'lzirlilnrs. o.lioziiion.

'llzisr lnwnlion rrlu'rs lo iinln'ovenients in l innelingf inneliinos:in-:l more espeeinll-`v in y arliinis designed lo iunnel llio 'ions nlAilu;- exlorior portion ol ille erirll. i' ille purpose ol providing i.possono lor roilroiul trizif und other vehicles For ilir nwnroinr-lllrl; ores, for ne, ronsirnri ion ol' sewers on lir or iior lil eowlnrlionor ennuis,

The ol oi nig' invenion is lo rien, irri'. in 'ille oonnj' oit lleni'orolfn'ndol lio ro in "exiled (zerl'nin lininoi'eziwiis inrl`unnelingprovide z mined or means 'iro may be pene rnloil irrou Ipeculiar formol'ions. ii: ilu: inininnun oli' iiineond ai' :i low if ofironslrnelion combines dnrribillly willi rliorougli israeligullilily inusr- ;ind wliielx lining uuomalio in ils (narration oliviziies ilioem'iioynionl und conslunwnl esporre oll experi; operaives. lily inw 'ionconsists; vfiz'li'lliis end in "fion"j in "ridingg' one or morevertically surressii 1. lmi'ories of sulisloniizilly 'parallel7luniz/.onlullfx id. inilopendeolly operoiod 1omver drill", 'i being-greri'irolly' and luterzillv ndilimilile,4v nr lie eli'eolnolly emploi(lo nrneirno u ,rv pox'ion of o. pio fleernineil oren.

f ,liliodinloni oi' lne inrenlion is illus` i V f drawings in il oljnliirli lise roeier subsi' Jouml seerion 3 :in lien along o :inenlargeiil frog filone' si line 4--'l, 'Eril gi nenl' fr ry ing mirri anline li few izilren i Q Si :i J:inflige is inelnded in 'theSpecification of Letters T?eent.

l'ioolcaion .Filed November G, 1907.

o". i?, showing' 'the I U3? DENVER, OLRADU.

lefenlod flieg." 2li, i930. Serial No. 409,985.

supporting und elevating mechanism, Fig. l0- on enlarged horizontalsection through the oir o linders respeolively employed toroeiproontingly more ille drill bearing earring@ sind one of ille drillssupported hereon, Fig'. ll-- :i rzignieniary jlronlc View of the drillcarrier, llie drills mouned thereon and ille subissent plniforni, Fig.l2 n fraginenl'nry plan View. of lille front end of ille saidi'lliil'orm ond lhe therewith associated con; liar, l? i3 a from View ofthe said @un lmr in o position identical with the one shown in ll, theextreniiies of the pending' rods comprised in lille mechanism wl'iielieonlro'ls lle oirinlol of ille drill feed cylinder lowing been shown inn, dil'erent posiion. lFig lan View lliereof, Fig. l5f zi 'rien' similarlo lfi lll w' -1 lille com .in on fidjlisied poA lion.y andlligs. 16,

l le and 13m-enlarged views of the mechanism employed lo ronl'rol Jdieinlet of air info the drill feed cylinder, in dill'erenl positions.

leferriin@h the drawings, the reference character desiguales a truck,the wheels of Wliioli adapted io be presented in 'operziliro .relationtri 'die rails of :1 railway imei( und upon which are erected fourVertical columns l, arranged/lo forni a quadrangle and connecied attheir upper eX- lreinilies by n horizontal frame 5.

The columns 4l are designed lo guide and support one or more YeriiezillYmovable platforms 6, which projecting liwyond ille foreinost end of thetruck, sunport upon lieir projeeling porlions 7, vne laterallyi'nos'nlile drill carriages 8, npon which the horizontally alined,parallel drills il are long'ii'ndinallymiovsbly mounted. liirli platformlios, in its body portion.y :four openings G lirougli which `illecolumns extend and ils projecting portion 7 n laterally rangingdevel-oiled guide ll), which' is occupied T'y correspondingly shapedtongue ll on the drill Carrier. The latter is composed of a plate 12provided with a plurality or" equidistant superposed, pan ollel integralbases 135 whose ilalupper vof impelling the di' ical appliances or bypower derived from steam, electricity or compressed air, preferencelbeing given to the latter which is the aetuatingmedium for which thedevice illustrated in the drawings is especially adapted. v

To eliminate the disadvantages to a madoes not form'part of my inventiona detailed re resentation vof the same has been omitted rom thedrawings.

The 'blocks 13j which extend above the plate 12, are boredlongitudinally for the reception of a piston 18, the rod 19 of whichextends through a gland 20 in the foremost end of the said' bore andconnects with av depending lug 2l on the foremost extremity of the drillhousing. A pipe 22 arranged alongside of each block communicates withthe respective bore at points adjacent its extremities and is providedwith a three way valve 23 by means of which the motive fluid may beintroduced alternately at opposite sides pf the iston for the purposeill toward or from the face of the rock which is being penetratedthereby. The valve 23 communicates by means of a branch pipe 24 with themain supply pipe 25 which connects with a conveniently located source ofpower which for civious reasons has been omitted from the drawings.

The compressed air which actuates the drill bit is introduced into thehousings 16 by means of flexible conduits 26 one end of which connectswith the supply pipe at point 27, while their opposite ends are attachedto a projecting portion of valves 28 applied to theV housing incommunication with its interior pants. The valve 28 which is designed tocontrol the influx of air into the drill housing to which it is attachedand the consequent'. .reciprocating and rotative movements of the drillbit, is turned from its open to its closed position and vice versa by adownwardly ranging arm 29, one end of which is connected with the valvestem while its lower end terminates above the upper surface of therespective block 13 and in the path of a therewith integral projection30. When the valve 28 is-open to admit aii into the cylinder during theforward movement of the drill 'the arm 29 depends perpendicularly, asillustrated in Fig- 7 of the drawings, in which position it, ismaintained by a spring 31 zwranged intermediate the leve-r and alaterally and rearwardly projecting lug 32l on the housing 16. The valveremains open until the drill has returned to its normal or retractedposition, when by engagement with the beforenamed projection 30, thelever 29 is `moved for- -70 wardly and the position of the valve is inconsequence reversed. At the commence ment of the forward movement ofthe drill, the spring 31 returns the lever to its original,perpendicular position, which movement re-opens the valve.

To obviate superfluous illustration the construction of the variousvalves, which may be of any suitable design, has not been shown in thedrawings, and their location has merely been located in the conventionalmanner.

The valve 23 which controls the air inlet 'into the bore of each of thebases 13, is convnected'with the member 34 of the toggle 33, the othermember 35 of which is fulcruined at a oint 39 upon the adjacent side ofthe said ase and connects at its outer extremity with the lower, slottedend of a. bar 36 which is mounted to move vertically alongside the base13 in proximity to its foremost end. A spring 37 arranged in a recess inthe plate 12, in en agement with the lowermost portion of t e lever 36tends to maintain the latter in its raised position.

lVhen the drill is in its rearmost position as well as during itsforward movement, this lever 36, whose upper .portion projectsthroughalongitudinal slot 1n the upper, laterally projecting portion ofthe base 13, is en age by a laterally projecting longitudina ridge 38 onthe lower portionof the drill housing, which retains it in a depressedposition until the drill housing and the therewith associated ridge havereached their foremost position and have passed the point of location ofthe lever 36, when the\latter,impelled by the expansive action of thespring 37,V moves upwardly and causes, in coperation with the toggle 33,reversal of the valve 23 (as shown in Fi 7).

The to gle 34 is provided at its joint with a depen ing rod or pendant40, the upper end of which connects pivotally therewith, while its lowerextremity, projecting through an aperture 41 in the plate 12 of the'carrier 8, extends in front of the adjacent'front edge of the extension7 of theplatform 6 and in the path of u wardly; ranging camson a cam bar42, whic movably engages the said front edge, subjacent the plate 12.

The bar 42 is held .against vertical displacement by means of bolts 43which being secured in the platform 6, project through longitudinalslots 44 in the said bar, vwhile a 125 contracting spring45, arrangedintermediate an end of the bar and a projection 46 on the platform,resilicntly retains the former in its normal position as illustrated inFigs. 11 to 14 inclusive. The bar 42 is formed in its 13oupper S @wewiti'i n ngniar depi'ressing, ih@

iippositaib1 inclined faces if( und 48 o' which consiinie the @innsdesigned "0 engage th@l and 1li 0i ma drawings. The opening i in thepini@ "in iirough winch iin rnd ai@ extenc'iis, has vo and been inf-1deHaring1 so to permit nnivement (if in@ l id rmi about iis pivnfmi. inthe direction nwarii Fn@ 'Fron @ff die madrina.

The in @infini of the ririii carriage ii int @rally in reiaiiofn in 'nepintforni (i, aci-mnpiished by mean@ @i a, iniiow @finder 49 whichforming' part tim, said carriage j 'encifapiii'a''iei. therein beyondiis refr'ninsi: edge, am H i Qiends thmngh giand .'32 emiy si? yiinierund in eiii'ion "L0 th@ pizii'nrln ii by therfawii integri, npnizrdij/@2;- irenring 53. A pipe exlanciing aiimfe the cjfiindair Ji-fi, coni-.miinicaeii with iattnrs noire zii', iis opposite @iiirniii-is una iSprovided s'i'ii a iiirrwm #wiwi n means n? which 'the nioiive fini@ 'mayin@ wir duced aiiernately Opin sire Sifis tin: piston and which, cnnneciby mie-ans ni? fi. cndni 5: 'wiii iii@ main snppiy pipe .95. r Eachpiaiinrm 6, xnovfe-xt (inrmg time perziion of iii@ apparatus, inernni'.-Mindy in f" iiczii direciin for the pnrpwse of bringzng ine riils iniii@ iiziery :wir pnriiid iiwremn in iuigngeinn't Wih the iiifirenporinns nii 'die area iiy is desirs@ to umnoL ihr iw *in of ih@ saidvericzii movi menig iiing n iiorm and prnimfminedz provide in iii and,two imni Screws v 57"? which @Manci-ini@ Verticaiiy, a?, oppoisiiesifies of ie irnck lntnrmeia@ and niinwi with hncnhnnr l, nr@ rotntabij;innnnmi in Sniable beaiinggi upon iii@ Said truck anni die #Gp fram@ Timscrews 5( are provid-ed than imi/fer enfin nih worin whinis 55E ini'owhich mmh worms 59 secnrd :it oppmiin fands of ai shaft G which mianbyinount- (ed, transverseiy of the ruck in bearings Si.

A rotary movement. is impnsfe-.d tin lxe shaft Si) (hiring Une Operationof iii@ miirhney by means nl zi haii. or cnam Winvn minimis Wih in motor83 mnuneri upon iii@ rear @mi izrnrik nd which may in* :ic-

lirxnigin in@ medium n'f'eiectrin'iif', mi or mijn' nw Y@ Huid. Thecoinnzn. f :ire r rmei wi 1 aquiflisraagfiiv peripheral miapifiii inreceive the semi-Gi*`- nuk iuirrnnmi by nimm; ni" imii's nr pins i. i'ifw @xix-riunirsi m" iw ivx'irx (ifi winnie ,l iinin ine 'minisengaging he columns. in encit mir, mez-lap nnfi iire prm'izimi withregis` Sinin 'U2 iin-(infix which vxvnfis :i pin ji'icing inirniiy :5mina rmi WJ which niiing iwn'rsfn iii@ Sio'ied ends ni the rs, form; pari'of n pisnn 'Hi which. m-

' with 'rhs pisnn cmnicfl Wiii iin? ,(,gipuziie pair of invern, iniittcri in. u cilinder "ii swim-cai upon iin) pizt'finin in Pen'riil riint-inn therein,

'ii'ie oppnsit nnr exrmnities oi the rods 4S?) vrniinnte in binari-ateddtrnis 01 finis T2 :sfinped i0 engage the tin-md m71 the respub- 'iraifimi svi'ews i? :imi ihn member?, of iii@ two ioggies formed bj' iii@iniernonmiriinn 0i' iin* im me rewrssediy mounted ieri-ws n'iiil tirei'iispeuive pinion rods, :me su n1'- rangged Huit wiwn iii@ @XirmnitiesMi of in@ llevar.; w ing@ iii@ ihffre oppnsiic grnni'is in h@ ifniinnns'he iivinnii; sire (iisvngmged @sich nf iii@ nisinns :ind ifinnds termedni opp@ enfin of the cylinder Ti, tomi to ri nin in@ parts in the pwiinniiinsrziiwi in i Fig'. i of iii@ rirnwii ijs in whim! he levers engagethe cnhnnnw anni the nuts* T2 am: (iisnngnged from ine srews The mrir@inid by, "which H ioikinjg imfcimnisin ziciuntvdf, im iii-minced ini'o jfixe cylinder T1? inermedini'n (im two pinons dining-ii a pip@ Hf whichsimili rernrvnir T secured npmi iii@ pintifnrni rnd which is snppiied n'nir by man n cnnini- 76 cnnnming with tim iie''nriisiinefi snppiy pipe'ifin vondniti; T-i and 7L :it opposif: Siders of' die resi'voir areroszpfciwij/ pravifed viih wives Ti' anni 79, on@ of Whif-ii upon wixii@ixe o'her one is Cine-ed :infi whim@ meins; :mi Connncimi withnpiirzirdiju iiinging'-zei1z1s T9, ihn 11mm ends of *which Ponni f' withthe terminal pnriinn :if nur S0 n'infii @Xiti/nds in pm'uiici Weia- Onin thv piaiform :ind tmrninncs in pro-xi' i vnrrinjge 52. The (-yiindilri 7i has. in iis wail iw@ or more whims-i pnris r Si whluii wlwn the ivmpis'ons mim rmufhmi iii@ mid ci hvir outward Stroke1 como incnn'nnnnit'ziion wih iiiw inerinmiini, p0ri'ion in@ inici-im: 0i iii@cyiinfivr and finis niicori'i :in (infini Fortini nir inrmincki inferiLl inte through Hw pipe 7% fimn ihn raser- `va'ii 75l The above iesmiiiidincwfininisn'xs which are resperti'ivaiiy Gnxpioywi to impari :ininierxniieni. verimii innwmnn in iii@ piniimnl nini n izifriai infiionin iw iiircn'iiii nssocinefi ffiriii wiring@ :ire nr'uiiiefi by theniinwing nimma. Pivoaiiy Secured i0 ings npnn fhi Orgy? n?" rinvii base13 of *rhs minimis with :1

carriage 18, in advance of the respect-ive with thev lever 98 duringlateral movement drills 9 when t-he latter are in their rearmostposition, are normally vertical levers 83, the lower arms of. whichconnect respectively withthe adjacent extremity of pitmen 84 whichrespectively extend alongside the various bases upon the carriage and inparallel 'relation to the longitudinal axes of the drills. The extremityof the upper arm of each of the levers 83, projects in the path of alaterally projecting ridge 85 which extends longitudinally along theadjacent side of each of the drills of which it forms part and whosefunction is to cause the normally perpendicular lever 83 to turn aboutits fulcruin and to impart a consequent longitudinal movement tothetherewith connected pitman during the reciprocating movement ofthedrill. rlhe opposite ends of the various pitmen have slots, throughwhich roject the wrist pins of crank arms S6 Awhich respectively dependin ad jacency to the different drills comprised in the battery, from acrank shaft 87 which is rotatably mounted in suitable bearings,transversely of the carriage 8. The shaft 87 is furthermore providedwith an upwardly extending arm 88, whose upper extremity carries agravity pawl 89 which engages the peripheral teeth of a ratchet wheel 90secured upona shaft 91 which is mounted in bearings 92 on the carriage.A spring 93 engaging the arm 88 is provided to resilliently maintain thepawl in Y through instrumentality of therewith co-y operativeappliances, reversal ot' the valves which control the ingress of motivefluid into the cylinderJ 19 and into the reservoir 75.

One of the above referred to appliances is composed of an arm 96 oneextremity of which is secured to the stem of the three- Way valve 55,whichf controls the iow of air through the conduit ,i3-1 uponthe'cylinder 49, while its other extremity extends below the cam 94 and`is i'esliently held in engagement therewith vby means of aI spring 97.The other appliance includes a lever 98 fulcrumed upon a bearing 99whichis secured upon the upper surface of the platform 6 and which ispivotally connected with the extremity of the hereinbefore mentioned`connecting bar 80 to whose opposite extremof the carriage 8. v

The sliding bar 12 u on the front end of the platform b' is impel ed tomove laterally during the outward movement of the extremity 06 of one ofthe levers 64, through instrumentality of a lever 101', fulcrumed at 110in a recess in the lower surface of the extension 7 of the saidplatform. The long arm 102 of this lever projects through an opening 103in the sliding bar while its opposite short arm-101 is pointed andprojects in the arenal path of a do 105 which is pivotally secured uponthe at jacent lever 64 in proximity to itsl extremity (36. The inwardmovement of the dog 105 is limited by a stop 100 and it is maintained inits normal position in engagement with the said stop by inea-iis of aspring 10T. When the extremity of the lever Gl moves inwardly the dogwill thus iass the extremity of the arm 101 withouteli'ecting itsdisplacement. On the retu'rn movement of the said arm, however,` the dogheld against the stop 106, will carry the said arm outwardly for alimited distance, thereby causing longitudinal movement of the bar 42 inan opposite direction, as is shown in broken lines in Fig. 8 of thedrawings. The moment the dog 105 disengages the lever, the bar 12 isreturned to its original position by contraction of the spring 45 andthe lever 101 is returned to its normal position in contact with a stop108, by means of a spring 109.

Having thus described the mechanical construction of my drillingmachine, -its operation is as follows The trucky 2 havmg been moved inproximity to the wall 119 which it is desired to penetrate, is securedagainst retrograde movement by any suitable means such as props, brakes.braces or the like, whose construction and arrangement depends oncircumstances and which for this reason have not been shown in thedrawings. l

The number of batteries employed on the machine and the number of drillscomprised in .each battery may be varied in' accordance withcircumstances and the areal dimensions of the opening it is desired toroduce. This description, however, wil be limited to a machine havingtwo batteries iis each of'seven drills, as is shownin the drawthecarriage has reached its outermost position, they are in the positionillustrated in Figs. 13 and 14, engaging the outer face of the bar,after having reversed the position of the toggles and the therewithassociated valves Q3, (Fi 16). The position of the pendants lon t eoutside of the'bary leaves them free to move downwardly when duringsubsequent forward movement of the drills, the position of the togglesis a am reversed through the upward motion 0 the bars 36. The variousmoving parts of the device are thus once more in the position in whichthey were vat the commencementof the operation and the drills will againpenetrate the rock until they have advanced the required predetermineddistance. The distances between the centers of thearallel bits in thedrills included in each attery, slightly exceeds a length equal to twicethe diameter of the hole produced by one of the said drills and thelateral movement of the drill carriage is limited to one half the saiddistance with the result that after a row of bores has been formedduring the first forward movement of the drills, the second movement,after the carriage has been moved laterally, will produce a num'- bei'of holes in alinenient with the first ones and respectively located atequal distances therefrom. The result is a row of holes separated bythin partitions.

When after their second forward movement the drills have been once morereturned to their original positions, in the manner hereinbeforedescribed, the shaft- 91 is again rotated one fourth of a revolution,causing the position of the valve 55 to be again reversed and permittingthe consequent re'. turning of the drill carriage to its originalposition on the plat-form. The toggles 33 remain during; this movement,in the position illustrated in Fig. 18, as the endants moving along theouter surface o4 the bar did this time not aft'ect the position lof theparts from which they are suspended but were returned to their positionin the depressions in the bar 42, as shown in broken lines in Fig. 11.During the second mov ment of the shaft 91, the lever 98 is engaged bythe peripheral, concentric surface of the cam 95 with the result thatthe position of the two valves 77 and 78 is reversed which closes thecommunication between the supply pipe 25 and the reservoir 75 and allowsthe air contained in the latter to exhaust into the space between thepistons in the cylinder 71, causing the said pistons to separate withthe result that the detents 72 at the end of the rods G9 engage thethreads of the screws 57 and the arenal extremities 66 of the levers 6stare simultaneously moved out of engagement with the grooves in thecolumns 4 into which they projected during the movement of the drillsfor the purpose of holding the lplatform against vertical displacement.The engagement of the detents` or nuts 74 with the screws 57, whichduring the entire o eration of the device are slowly rotated by tIlJiemotor 63, causes the platform to be either raised or lowered inaccordance with the direction of rotation of the motor. The moment thepistons 70 have reached the ,end of their outward'strokes, the air whichcaused their movement is exhausted through the ports 81 and the parts ofthe locking mechanism are retained in the adjusted positions by theengagement of the extremities 66 of the levers 64 with thecircumferential surface of the columns, in `which osition they remainuntil the said extremities have reached a position o posite thesucceeding grooves 4 of the co umns into which they will ent-er byaction of the springs 73, while the detents are simultaneouslydisengaged from the screws 57.

During the out and inward movements of the le`ver 64, shown in Fig. 8 ofthe drawings, the dog 105 engaged the arm 104 of the lever 101 in themanner hereinbefore described with the result that at the same time theextremities 6G ofthe levers reenter the grooves in the columns, the bar42 is moved longitudinally to assume the position illustrated in Fig.15, thereby causing the inclined surfaces 48 in its upper surface toengage tlie extremities of the pendants 4') which in consequence areraised and which return the toggles and the therewith associated valvesto the position illustrated in Fig. 1G.

The various members of the machine with the exception of the valves 77and 78 are now once more in the position they occupied at the'beginningof the Aoperation and the latter are returned to their original positionduring the ,next rotative movement of the shaft 87 which occurs when thedrills have all been retracted` and the carriage commences its lateralmovement. The distance between the grooves 4 of the columns and theconsequent length' of the downward movement of the platform, i equal tothe length of the lateral travel o the drill 'carriage, with the resultthat Ithe second row of holes will be separated from the adjoining rowby thin partitions 1egual to those between the holes comprised 1n eachhorizontal row and the variousgpartitions will when theentire area hasbeen traversed, present a honey comb which may readily be removed bystriking them witha hammer or dislodging them by the application of awedge or similar tool. To return the platforms to their originalpositions after they have reached the end of their 4limited verticalmovement, the levers 64 may be withdrawn i means such as a pin 64inserted into a corl. A lmn'liiig machine mmpiiing. in cmlini' lionwilli :i suitable support, n lml las@ sin@ mmins ffii@ zmlmniilif'zillymilling' will balli. v liiifsl'lillv l lunneling ii'lfficliin com ing inwnionmlmn will; ii, Suilalil Suppol, n llal @zich `diill infin` aWorking face, melius im lei-mined diStance in a lalej'l direction withrelation to said 'vertically movable pliitfsrm, and melius forieici'iciilly mowing said plalf fumi il pieelei'min distance Willifelalioii lo sliiil mippoi'l :ill of said means being ziiiminiiimilljvemol .'Aifineiilailly acliiiitigfl.

A lumwling imifsliine, comprising in winliiimlioin 'li suilnlilefilippini', ai bnry wf i-iick drills, nsf-ams for presenting' sindlnitlwy w il working;- i, incl means for priiieciing imlvpvndcnl'ly@lich (liill of said lrll'lm'y fm' opvi'lilinii iii Said facil.

E. unneling machine con'ip'isingg' in comhiimisin Willi a suilablesupport, :i bnl'- m-v if ioik drills, :und niezms m impari :il lin-nawlvial und i'm'imil movements lieict.

fl. il luimelizig inucliini. compiising in comliinnlimi willi n suinblesuppozl, zi lmiei'y me ioi'k drills, means iiclafgied lo impart iipreslelvrininml mwiiid niovemmi lo each drill, melius lo reverse illesaid movement ii, iri loi- .miion and means 'lo wary the por Hillen ofille snidliaiery inf relativi). is the coinliinziiml willi .a @nimblesiippm; i: ha@ iwii.' uf inilspeudenlly opeilling-zml-z {lrills mieliincluding ze, iscipmcail-ing, mziry bili, iz'iaazins zi-:izipekl loiinpiut la pmfleei'milfiel fnl-wurd inmune-nt lo @zich i'lll, .fimalicmeans m sizmzlluneuusly cams-e :icl'nziicm 0f ille respeclil'e lill,iiizlcmizilc means lo r9- v'eiss lili@ nuwelx'ienl if the drill il fillemmimillon of iis lurwuiil mwemen, au'omzilic nimma; l() Sinnilaneuusly(lisuoilfimle lha imivvnwnl' m lha bit and means lo fairyA ille posililmQi lie Said lialeiy in relzllimi lo the said Support A ll.zmnclingiinacliine comprising -in comliiiiiiiin willi l: suiablesupport, :i bnll'ei'y of mail: di'ills. ziiomaic means to iinpiu' lo@ndi (li-ill li iiecipioclling motion of predelerlniiwd length, ai(lfevice adapted lo impart ii laezil movemnl: lo tlie battery, :incl :in'iecliziuism assimilated willi lie Various drills minimised in lh@battery, ziclaple Ai mnnllinzilion willi ii suitable snppoll, :ibalclm'y of lfmgimlimilly ieuipinculing roel( (ll'illh iiivlmlingequidismil bits, :i Conli'ivimw zuliipeil to lnm'nlly move lha Saidballen-y z distance equal to lin aliquot part nl lli@ (lisliinw betweenauch tivo adjacent hilf; :and imams nssofizitwl with the vul-ions l1illscoinprisml in the balli-yy and adnpd lo aiclnile lie sliicll mnlli'anc@upon ille liiinimiion oli their ielni'n nmvenxenls.

l-l. A humbling machine coinpiising in combination willi a suitablesupport, u beit moving said buttery as siiA unit a predelil. linmeliiigmachine @minimising iximinnie llia` said device by @06pm-alive aic-'llmnling' machine comprising in tery of independently operatin rockdrills, means for projecting said dril s to operate on a rock face,means adapted to impart an intermittent vertical movement to saidbattery, and a device associated with the various drills comprisingthevbattery and adapted to operate said means for imparting a verticalmovement to said battery at the termination of the return movement ofthe drills.

14. A tunneling machine comprising in combination with a suitablesupport, a battery of rock drills, automatic means adapted to impart areciprocating movement to each drill, a mechanism vadapted to impart alateral movement to the said battery alternately in opposite directions,means adapted toV operate the said-mechanism at the termination of thereciprocating movement of the various drills com rised in the battery,and a contrivance adapted to intermittently move the said battery apredetermineddistance in a vertical direction.

15. A tunneling machine comprising in combination with a suitablesupport, a bat, te of rock drills operatively mounted to vbeongitudinally'reciprocated, means adapted to impart a reciprocatorylateral movement to said battery as a unit, at the termination of thelongitudinal lnovements of said drills, and means arranged to verticallymove s aid battery at the end of the laterally reciprocating movementsof thebattery unit, al1 of said movements occurring automatically in aprogressive cycle.

16. A tunneling machine comprising in combination with a suitablesupport, a batter lof longitudinally reciprocating rock dri s, means toimpartan intermittent vertical movement thereto, means adapted toI `mQvethe said battery laterally in opposite directions and automatic means toactuate the said drills alternately with the said lateral movements.

17. A tunneling machine comprising in combination a truck, asuperstructure thereon, a platform movably supported upon the latter,means to impart an intermittent ver-' tical movement to the saidplatform, a carria e laterally-movably supported upon the said platform,a series of rock drills reciprocatingly supported upon the carriage andmeans to impart a lateral reciprocating movement to the said carriage.

18. A tunneling machine, com rising in combination, a battery of rockdri ls, a support for said battery comprising a platform, standardscarrying said platform, and means for disengaging said platform fromsaid standards to move it vertically step-byste 1li). A tunnelingmachine comprising in combinatiom'a battery of rock drills, `a supportfor said battery comprising a platform, a plurality of standards, aplurality of levers secured to said' platform and engaging saidstandards, means for disengaging said levers from said standards andmeans for moving said platform along said standards step-by-step.

20. A tunneling' machine comprising in combination, abattery of rockdrills, a support for said battery comprising a platform, a plurality ofstandards, a plurality of levers secured to said platform and engaging'said standards, a plurality of vertical screws, and means fordisengaging said levers'from said standards and causing them to engagesaid lead screws to vertically move said platform -step-by-step. p

In testimony whereof I have affixed my signature in presence of twowitnesses.

GEORGE R. BENNETT.

Witnesses:

G. J. RoLLaNnnT, K. M. STUMP.

